156828673 has 4 divisors (see below), whose sum is σ = 157050580. Its totient is φ = 156606768.

The previous prime is 156828631. The next prime is 156828677. The reversal of 156828673 is 376828651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376828651 = 43 ⋅8763457.

It can be written as a sum of positive squares in 2 ways, for example, as 6594624 + 150234049 = 2568^2 + 12257^2 .

It is a cyclic number.

It is not a de Polignac number, because 156828673 - 2²⁵ = 123274241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156828677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109890 + ... + 111307.

It is an arithmetic number, because the mean of its divisors is an integer number (39262645).

Almost surely, 2^156828673 is an apocalyptic number.

It is an amenable number.

156828673 is a deficient number, since it is larger than the sum of its proper divisors (221907).

156828673 is an equidigital number, since it uses as much as digits as its factorization.

156828673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221906.

The product of its digits is 483840, while the sum is 46.

The square root of 156828673 is about 12523.1255283975. The cubic root of 156828673 is about 539.2727670540.

The spelling of 156828673 in words is "one hundred fifty-six million, eight hundred twenty-eight thousand, six hundred seventy-three".